Rhoades K, McPherson B, Smyth V, Kei J, Baglioni A
Department of Speech Pathology and Audiology, The University of Queensland, Brisbane, Australia.
Ear Hear. 1998 Dec;19(6):450-62. doi: 10.1097/00003446-199812000-00006.
To investigate the effect of increased levels of background noise on click-evoked otoacoustic emission (CEOAE) recordings and to compare the effectiveness of the default CEOAE program with the QuickScreen CEOAE program in increased levels of noise, using an Otodynamics ILO88 recording device.
The right ears of 40 young adult women with normal hearing were assessed using CEOAEs under four different noise conditions and with two different methods of data collection. The noise conditions were in quiet, 50 dB A, 55 dB A, and 60 dB A of white noise. Data were collected at each noise level in the default mode and also using the ILO88 QuickScreen program.
There was a significant change in a number of important CEOAE output parameters with increased noise. In the default mode, mean whole wave reproducibility was 89.2% in quiet but declined to 85% with 50 dB A of white noise, 65% at 55 dB A and 20% at 60 dB A. The QuickScreen program proved more robust to the effects of noise than the default. In that mode, mean whole wave reproducibility was 91.7% in quiet, 92.5% with 50 dB A of white noise, 82.5% at 55 dB A and 45% at 60 dB A.
The findings of the study indicate ambient noise levels for accurate CEOAE recording should not exceed 50 to 55 dB A of noise and alternatives to the default program should be considered in non-sound-treated situations.
使用Otodynamics ILO88记录设备，研究背景噪声水平增加对短声诱发耳声发射（CEOAE）记录的影响，并比较默认CEOAE程序与QuickScreen CEOAE程序在噪声水平增加时的有效性。
对40名听力正常的年轻成年女性的右耳，在四种不同噪声条件下并采用两种不同数据收集方法，使用CEOAE进行评估。噪声条件为安静环境、50 dB A、55 dB A和60 dB A的白噪声。在每种噪声水平下，分别以默认模式和使用ILO88 QuickScreen程序收集数据。
随着噪声增加，一些重要的CEOAE输出参数发生了显著变化。在默认模式下，安静环境中平均全波重复性为89.2%，但在50 dB A白噪声时降至85%，55 dB A时为65%，60 dB A时为20%。结果证明QuickScreen程序比默认程序对噪声影响的耐受性更强。在该模式下，安静环境中平均全波重复性为91.7%，50 dB A白噪声时为92.5%，55 dB A时为82.5%，60 dB A时为45%。
该研究结果表明，进行准确CEOAE记录时的环境噪声水平不应超过50至55 dB A，在未进行声学处理的情况下，应考虑使用默认程序以外的其他程序。
